hopkins



(No Model.) 2 Sheets-Sheet, 1. A. J. HOPKINS.

PUMP. No. 274,446. Patented Mar. 20, 1888.

WITNESSES ATTORNEK (No Model.)' 2 Sheets-Sheet, 2. A. J. HOPKINS.

I PUMP. No. 274.446. Patented Mar.20,1 8 83.

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NITED STATES AYDBEWV J HOPKlNS, OF ROCHESTER, NEW YORK.

PUMP.

SPECIFICATION forming part of Letters Patent No. 274,446, dated March 20, 1883.

Application filed December 8, 1882. (X0 model.)

To all whom it may concern Be it known that 1, ANDREW J. HOPKINS,

Figure l is a vertical sectional view of my improved pump complete, showing it in working position at the bottom of a well. Fig. 2 is a diametrical sectional view of the plunger or bucket and part of the tubular piston-rod on an enlarged scale. Fig. 3 is a bottom view of the plunger. Fig. 4 is a sectional detail view of the stuffing-box, and Fig. 5 is a detail view of the check-valve at the bottom of the pump and its seat.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to sin gle-cylinder force-pumps adapted for immersion in wells or cisterns, or for other purposes for which this class of pumps is applicable; and itconsist-s in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

In the accompanying two sheets of drawings, A represents the pump-cylinder, which I prefer to construct of cast-iron porcelainlined. B is the inlet. B is the supply-pipe, and (l is the discharge-pipe. I) is the boztom valve, of leather, rubber, or similar material, which has a weight, E, and seats against an annular bead, F, encircling the inlet in the bottom of the pump. The bolts or rivets G, which fasten the valve to the bottom of the pump-cylinder, pass through a re-enforcing ring or head, 11, cast with the bottom and encircling the central head or valve-seat, F, the re-enforcing ring being enlarged or widened at the part where the rivets G pass through it, as shown at you Fig. 5. In this manner I provide for the necessary strength and solidity of the parts without undue waste of metal.

The top and bottom plates of the pump-cylinder (shown, respectively, at A and A are cast with ears or lugs a and b, for the attachment of the pump to pump-standards or other suitable supports, thus avoiding bands, collars, clamps, or similar means of fastening. The top plate, A, has a stuffing-box, I, made with an interior annular shoulder, 6, upon which the packing K is tightened down by means of a screw-cap, L, screwed upon the threaded outside of the stufling-hox and bored through centrally for the insertion of the piston-rod. The latter (shown at M) is tubular, and may conveniently be made of gas-pipe of the desired size, according to the capacity of the pump. The rods N are also tubular and of the same size as the piston-rod, to which they are coupled or connected by ordinary screwcollars in the well-known manner of uniting lengths or sections of gas-pipe. The upper end of rod M N is closed by being screwed into a solid head,'0, which connects it with the lever or handle for operating the pump.

Upon the lower end of the tubular pistonrod M is shrunk or otherwise fastened a collar, P, against which the several parts constituting the plunger or piston-head are clamped by a flanged bottom nnt, Q, screwed upon the extreme lower end of the piston-rod. The plun ger is composed of the following parts, viz: the top valve, R, consisting of a disk ofleather, rubber, or other suitable flexible material, to the sides or flaps of which are riveted metal segments 4" r, to keep the parts of the valve over the valve-openings from warping and from being forced down into the valve-openings on the upstroke of the piston. Next to this, on the under side, comes-a circular metal disk, S, having openings s 8, arranged directly below the flaps of the valve-disk R. Under this, again, comes the packing-disk T, and below this the clamping-plate U, which, as well as disk T, have openin gs (shown, respectively, at t t and a u) registering with the openings or apertures in disk S. The several parts, R, S, T, and U, are clamped together, so as to bind against the fixed collar P, by a nut, Q, screwed upon the lower end of the tubular piston-rod. This nut has a flaring flange, q, forming, as it were, an inverted hopper or funnel, which may be covered by a piece of coarsemcsh wire-netting, V, for the purpose of preventing grit or sand from entering up into and choking the narrow air-chamber formed by the tubular pistoirrod M and sucker-rods N.

From the foregoing description, taken in connection with the drawings, the operation of myimproved pump will readily be understood. Its several working parts are so simple that there is no danger of their getting out of order, and the air-chamber formed by the tubular piston-rods and sucker-rods insures asteady flow of water at, an even pressure without takin g up more space than if solid rods were used, and obviating the attachment of a separate air-chamber to the pump-cylinder. By making the clamping-nut Q flaring, as shown, the wire-netting spanning it will not interfere with the capacity of the tubular air-chamber, and this construction also gives a larger area to the lower opening or mouth of the air-chamber, causing it to operate against a larger area of water in the bottom part of the pump-cylinder than if the mouth of the tubular .air-chamber-were only of the same diameter as the pipe or tubing M N. By turning the flange of the packing-disk T down instead of up, I compress forcing ringH, in combination with the weighted valve D E, fastened to the bottom plate by bolts or rivets G,inserted through re-enforcin g ring H, substantially as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.

ANDREW J. HOPKINS.

Witnesses:

G. W. RANKIN. 0. R. TERBURGII. 

